That's odd that Ford doesn't do that on the Cortina and I wonder why they stopped doing it?? On the 100e series all the engine blocks are engraved with the chassis numbers but more often than not they won't match because the engines are so frequently changed._________________Anglia 100e modified
Prefect 100e stock

Around 1961 or 1962 Fords changed the system. The Chassis Numbers became more like modern VIN numbers and gave a lot more information than previously: building plant and date of manufacture amongst others. This was no longer applicable to the engines, so the two became divorced. Early 105Es used the previous system, and the last 100Es used the later one.